· Level 2
Why VPNs Get Blocked
The censorship side of the story: blocking methods, DPI, filtering and the reasons an ordinary tunnel stops working.
3 articles
-
1
Why a VPN Can Work Today and Fail Tomorrow
A tunnel that worked yesterday can stop working with no change on your side. The documented record shows four distinct causes, and only one of them is the censor.
Research · Intermediate · 11 min read -
2
What Is Internet Censorship?
Censorship is not one thing. It is DNS, ports, TLS names, packet inspection and active probing. Five layers, each answering a different question about your traffic.
Guide · Beginner · 7 min read -
3
What Is Deep Packet Inspection?
DPI reads the shape of your traffic, not just where it goes. How it works, what it can classify, and why encrypted tunnels still give themselves away.
Guide · Beginner · 6 min read